// $Id: future.c 86 2011-05-04 17:33:43Z cedric.shih@gmail.com $
/*
 * Copyright (C) 2011 Cedric Shih <cedric.shih@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include <string.h>

#include <niohttp.h>

#include "log.h"
#include "helper.h"
#include "context.h"

#include "future.h"

int niohttpd_future_readable(struct niohttpd_future *future,
		niohttpd_handler_cb cb, void *arg)
{
	int rc;
	const char *method;

	if (!future || !cb) {
		niohttpd_error("null argument(s)");
		rc = NIOHTTPD_EINVAL;
		goto finally;
	}

	method = niohttp_request_method(future->context->request);

	if (!niohttpd_request_body_expected(method)) {
		niohttpd_error("no content was expected in method: %s", method);
		rc = NIOHTTPD_EPERM;
		goto finally;
	}

	if (future->readable.remaining <= 0) {
		niohttpd_error("all declared content length has been read");
		rc = NIOHTTPD_EPERM;
		goto finally;
	}

	future->readable.cb = cb;
	future->readable.arg = arg;
	rc = 0;

finally:
	return rc;
}

int niohttpd_future_replyable(struct niohttpd_future *future,
		niohttpd_handler_cb cb, void *arg)
{
	int rc;

	if (!future || !cb) {
		niohttpd_error("null argument(s)");
		rc = NIOHTTPD_EINVAL;
		goto finally;
	}

	future->replyable.cb = cb;
	future->replyable.arg = arg;
	rc = 0;

finally:
	return rc;
}

int niohttpd_future_writable(struct niohttpd_future *future,
		niohttpd_handler_cb cb, void *arg)
{
	int rc;
	const char *method;

	if (!future || !cb) {
		niohttpd_error("null argument(s)");
		rc = NIOHTTPD_EINVAL;
		goto finally;
	}

	method = niohttp_request_method(future->context->request);

	if (!niohttpd_response_body_expected(method)) {
		niohttpd_error("no content was expected in method: %s", method);
		rc = NIOHTTPD_EPERM;
		goto finally;
	}

	if (future->writable.remaining <= 0) {
		niohttpd_error("all declared content length has been written");
		rc = NIOHTTPD_EPERM;
		goto finally;
	}

	future->writable.cb = cb;
	future->writable.arg = arg;
	rc = 0;

finally:
	return rc;
}
